Technical Articles Articles

Combating rising seas with floating structures

Introduction Rising sea level is an existential threat for many coastal cities. The sea is rising subtly but relentlessly at an exponential rate. Many predictions of how high and how fast it will rise in the next 50 years have proved to be understated. According to...

How to identify the spoolpiece lifting points?

In the offshore construction industry, the connection between the newly installed pipeline and the riser is accomplished via a series of ‘spoolpieces’ (or spools). The spool is fabricated by welding pipe joints to form an L-shaped, Z-shaped, or possibly a straight...

The importance of clear decision support before marine operations

Our oceans are interspersed with human activities: be it fishing, marine transportation, or offshore operations. These operations usually involve assets worth multiple million dollars, be it the produce or the equipment or in most cases, the human life. Produce from...

Sea Pressure Loads Calculation based on DNV Rules

Introduction Sea pressure loads are an important factor in the structural design of a vessel. What is sea pressure load? As the term suggests, it is the external pressure on the vessel due to the surrounding sea. What kind of pressure it is, and how to...

The Optim22 method of hull optimization – Part 2

The Optim22 method of hull optimization – Part 2

This is a follow-up article to the previous article on Framed Structures Optimization....

The Optim22 Method of Weight Optimization of Framed Steel Structures

The Optim22 Method of Weight Optimization of Framed Steel Structures

1 Abstract A semi-automated structural weight optimization system is presented for framed structures of post and...

Combating rising seas with floating structures

Combating rising seas with floating structures

Introduction Rising sea level is an existential threat for many coastal cities. The sea is rising subtly but...

Designing bolts for a joint connection

Designing bolts for a joint connection

Introduction Bolts are very commonly used fastening items and used in a variety of configurations. In this...

The why and how of designing a lifting beam

The why and how of designing a lifting beam

Lifting beams are universally applied gear used widely in various types of lifting operations, onshore and offshore....

Draft Surveys: Methodology, Calculations, and common errors

Draft Surveys: Methodology, Calculations, and common errors

Introduction Marine transport is the backbone of the global trade and reasonably can be considered to be the...

Designing a clip/dog plate for seafastening

Designing a clip/dog plate for seafastening

Introduction In an earlier article, we saw how to design stoppers for seafastening. Stoppers are items that are used...

The Bulbous Bow – types, characteristics, and effects

The Bulbous Bow – types, characteristics, and effects

This is Part 2 of the two-part series on Bulbous Bows. For Part 1, click here By Tamal Mukherjee, *This...

Marine Propeller and Shafting Alignment – Part 2

Marine Propeller and Shafting Alignment – Part 2

Gap & Sag Alignment Gap and Sag Alignment is carried out to bring the engine to its final position, in case of...

Marine Propeller Shafting and Shafting Alignment – Part 1

Marine Propeller Shafting and Shafting Alignment – Part 1

*****This article first appeared in July 2018 edition of Marine Engineers' Review (MER), India. We're reproducing it...

Using Class Rules to assess the Longitudinal Strength requirement of Barges

Using Class Rules to assess the Longitudinal Strength requirement of Barges

Introduction The longitudinal strength of a vessel is integral to its evaluation for a given purpose. To get an...

The four important factors for a ship’s windage area calculations

The four important factors for a ship’s windage area calculations

Introduction The windage area of a vessel or offshore structure is the area that is exposed directly to the wind. As...

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